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(No Model.) a 22811$ $h66fl 1.

A. J. OEHRING. INSTRUMENT WINDING DEVIIGEL mum Pm 1, 1898.

(No Model.) 2 Sheets-Sheet 2. A. J. OEI-IRING.

INSTRUMENT WINDING DEVIGB. I No. 598,272. Patented Feb. 1, 1898.

AUGUST J. OEIIRING, OF CHICAGO, ILLINOIS, ASSIGNCR TO THE WESTERNELECTRIC COMPANY, OF SAME PLACE.

INSTRUMENT-WINDING DEVICE.

SPECIFICATION forming part of Letters Patent No. 598,272, dated February1, 1898.

Application filed October 12, 1896. Serial No. 608,605. (No model.)

To aZZ whom it may concern:

Be it known that I, AUGUST J. OEHRING, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a certain new and useful Improvement in Instrument-findingDevices, of which the following is a full, clear, concise, and exactdescription, reference being had to the accompanying drawings, forming apart of this specification.

My invention relates to electrical instruments, and has for its objectthe provision of improvedmcans for winding electrical conductors aboutthe cores of electromagnets.

In an application of Henry H. WVait, filed December 14, 1896, Serial No.615,707, is shown and described a device for winding the cores ofelectrical instruments, consisting in its preferred'form of arotatably-mounted chuck adapted to secure a core in position, providedwith guiding-lips to direct the conductingwire upon the core or withinrecesses provided in the core. My invention relates particularly to thedevice shown and described 2 5 in said application, and will bedescribed in connection with the accompanying drawings, in which Figurel is an elevation of a head-stock of a lathe with the device of myinvention in po- 0 sition, a source of electricity for magnetizing thechuck being diagrammatically shown. Fig. 2 is a plan view of the chuckwith the armature-core in position. Fig. 3 is an enlarged View of aportion of the mechanism on line 3 3 of Fig. 1. Fig. 4 is a view of thesame portion of mechanism, taken in the direction of the arrow 4, Fig.3. Fig. 5 is a plan view of the apparatus shown in Fig. 1. Fig. 6 is aperspective view of a drum-armature wound by the apparatus of myinvention.

Like letters refer to like parts throughout the different figures.

The core a is constructed of lamina of sheetiron, each sheet havingcircular holes near the peripheries thereof, the peripheries beingprotension h to the live-spindle h of a lathe, the chuck being providedwith a curved jaw 5 adapted to receive the armature-core. The stem ofthe chuck is surrounded by magnetizing-ooil of wire 0, the terminalswhereof are connected to two insulated collectingrings 01 cl. Brushes ee contact with said collecting-rings. A switch f is provided, which isadapted to include a source of electricity 9 in circuit with saidbrushes, rings, and coil to magnetize the chuck-jaw,which is thusenabled to secure the core a in position by magnetic attraction. Theface of the chuck-jaw opposing the core is preferably recessed at b Thearmature-core is disposed within the chuck with opposite recesses inwhich a coil I of wire is to be disposed placed adjacent to the lips 12b of the chuclejaw. 'Alug b extending from the chuck-jaw, is adapted toenter another of said recesses to prevent the core from rotating afterit is adjusted. WVhile the core is being inserted within the chuck,current through the magnetizing-coil 0 should be broken. The surfaces ofthe lips 11 6 recede from the contiguous recesses in the core and arerounded, as shown in Figs. 1 and 2. In winding the armature thelive-spindle of the lathe is rotated, the armature-core being therebyrevolved in a .plane coincident with its shaft m. The armature-wire isattached at one end to the core and is unwound from its bobbin h as thecore is rotated and disposed within the opposite recesses in the core.The wire is held in the hand of the op erator in a manner to cause itsengagement sisting, preferably, of guards ii, composed,-

preferably, of rubber, which are placed over the projecting ends ofthearmature-shaft. These guards are preferably provided with conicalends, as shown in Fig. 2. In winding the armature upon the machineillustrated the wire is held to the right of the axial plane of rotationsufficiently to escape the points of the ends of the guards t' 2', thewire being thrust to one side by said guards and thereby directedagainst the lips- 1) b which guide the wire into the. contiguousrecesses a ct. When the first armature-coil has been wound, currentthrough helix 0 is interrupted by switch f, the armature-core iswithdrawn sufficiently to clear lug b and the core rotated to bring thenext succeeding empty recesses into position to receive armature-wire,current through the helix 0 being again restored to secure the armaturecore in its newly-adjusted position.

To insurean equal number of windings in each coil of the armature, Iprovide an instrument for measuring the number of rotations of the chuckand contents, which may consist in a cyclometer 7a, which is actuated bya roller mounted upon an arm k projecting from the stem of the chuck.When the cyclometer indicates the predetermined number of revolutions,the lathe belt is shifted to stop the rotation of the chuck, the corebeingthereupon readjusted for the winding of the next coil.

It is clear that the details of this invention may be modified Withoutdeparting from the principles involved.

I have purposely omitted the enumeration of modifications which may bemade without departing from the spirit of my invention, because to setthese forth at length would obscure rather than make clear the moreessential features.

Having, however, fully setforth one form of mechanism embodying myinvention, I claim, and desire to secure by these Letters Patent, thefollowing:

1. The combination of a rotatably-mounted chuck having a curved receiving-j aw adapted to receive a body of curved cross-section having arecess, and a lug b projecting from said jaw adapted to enter saidrecess, substantially as and for the purpose described.

2. In an instrument-winding device, the combination with a chuck adaptedto support a core having a projection or projections, and a guard 11adapted to be mounted at one end upon said projection, the opposite endof said guard being tapered, whereby wire may be readily laid about saidprojection upon said core, substantially as described.

3. In an instrument-Winding device, the combination with a chuck adaptedto support a core having ashaft, of guards t 2' each adapted to bemounted at one end upon an end of said shaft, the opposite ends of saidguards being tapered and guides 11 19 carried by the chuck adapted todirect wire upon said guards which in turn direct wire upon the coreabout the shaft, substantially as described.

4. The combination of arotatably-mounted chuck adapted to secure a corein position, said core being adapted to receive two or more distinctwindings of wire or other material by the rotation of said chuck, and aninstrument adapted to number the rotations of said chuck, substantiallyas and for the purpose described.

5. The combination with a chuck composed of magnetic material in wholeor in part, of a helix of wire surrounding a portion of said chuck, acollector-ring forming one terminal of said helix, a brush forming aterminal of a source of electricity adapted to rest in contact with saidring, means for connecting the other terminal of said helix with theremaining terminal of the source .of electricity, and means for rotatingsaid chuck about an axis substantially coincident with the center of thecollector-ring, substantially as described.

6. The combination with a chuck formed in whole or in part of magneticmaterial, of a helix of wire surrounding a portion of said chuck,collector-rings forming the terminals of the helix, and brushes formingthe terminals of a source of electricity adapted to rest in contactwithsaid collector-rings to include said source of electricity incircuit with the helix, substantially as described.

7. In an armature-windin g device, the combination of a chuck adapted tosupport a mag netic core having a shaft, and a guardt' adapted to bemounted at one end upon said shaft, the opposite end of said guard beingtapered whereby wire may be readily laid about said shaft upon saidcore, substantially as described.

8. The combination with a chuck, of an armature-core secured in positionthereby, and a shaft projecting from said armature-core, said shafthaving a tapered guiding portion at an outer end thereof whereby wiremay readily be guided into position upon the core about the shaft,substantially as described.

In witness whereof I hereunto subscribe my name this 17th day ofSeptember, A. D. 1896.

AUGUST J. OEHRING.

Witnesses:

GEORGE L. CRAGG, A. L. LAWRENCE.

